A heat advisory is in effect for much of Monday as temperatures reach the 90s with the heat index to possibly reach 109.Radar | Alerts | Weather App | Watch the forecast | Watch the reportA heat advisory means a period of high temperatures is expected. The combination of high temperatures and high humidity can create a situation in which heat illnesses are possible. The advisory took effect at noon and lasts until 8 p.m.Additionally, Baltimore City health officials have issued a Code Red Heat Advisory Monday. This comes after city schools canceled summer school programs because of the heat, although breakfast and lunch programs will still be open. Cooling centers will be open at five Community Action Partnership Center locations and at six senior centers from 9 a.m. to 7 p.m., offering cold water and air-conditioned space for residents without access to cool air in their homes.Click here for a list of Baltimore City cooling centersBaltimore City pools will also be open for extended hours Monday. Park pools will be open noon until dusk, and walk-to pools will be open from noon until 7 p.m.Click here for a list of Anne Arundel County cooling centersIn addition, Anne Arundel County police will make community rooms at the following precincts available for 24 hours or until high heat conditions no longer exist.- Northern District, 939 Hammonds Lane, Baltimore- Eastern District, 204 Pasadena Road, Pasadena (new location)- Western District, 8273 Telegraph Road, Odenton- Southern District, 35 Stepneys Lane, EdgewaterAll centers are accessible, air-conditioned and have water and restroom facilities. Medical care is not available and anyone experiencing or observing a medical emergency should call 911. Pets are not allowed in any cooling centers.Accommodations will be made for service animals.Click here for a list of Baltimore County cooling centersClick here for a list of Carroll County cooling centers (PDF)Click here for information about Harford County cooling centersAll Harford County Public Libraries will serve as “Cooling Centers” for the public’s use during normal business hours Monday and Tuesday. On Mondays, all branches are open 10 a.m. to 8 p.m. except for Darlington, which opens 3 to 8 p.m. On Tuesdays, the Bel Air Library opens 11 a.m. to 8 p.m.; the Darlington Library is open 3 to 8 p.m. and all other locations are open 1 to 8 p.m.The branch locations of Harford County Public Library are as follows:- Aberdeen – 21 Franklin St., Aberdeen- Abingdon – 2510 Tollgate Road Abingdon- Bel Air – 100 E. Pennsylvania Ave., Bel Air- Darlington – 1134 Main St., Darlington- Edgewood – 629 Edgewood Road, Edgewood- Fallston – 1461 Fallston Road, Fallston- Havre de Grace – 203 Market St., Havre de Grace- Jarrettsville – 3722 Norrisville Road, Jarrettsville- Joppa – 655 Towne Center Drive, Joppa- Norrisville – 5310 Norrisville Road, White Hall- Whiteford – 2407 Whiteford Road, WhitefordClick here for a list of Howard County cooling centersMary Hansley had the right idea, hitting up a city cooling center on York Road."It's so hot, you could pass out from the heat, so I'm grateful they have this place available for people to stop in and get some water and get some air," Hansley said.The heat can be especially hard on children. Down at the Inner Harbor, while kids were enjoying themselves in a fountain, Kristen Orem felt it might be best to take her daughter, Addie, to the Maryland Science Center to cool off."We try to go to the pool, but even on days like this, going to the pool, it's still just too hot. It's just dangerous having the little ones out here for too long," Orem said.Health officials have a long list of reminders when it gets this hot, including drinking plenty of water, avoiding alcohol and caffeine, wiping your skin with cool water as needed, reducing outside activities and wearing lightweight, light-colored clothing.

BALTIMORE —

A heat advisory is in effect for much of Monday as temperatures reach the 90s with the heat index to possibly reach 109.

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A heat advisory means a period of high temperatures is expected. The combination of high temperatures and high humidity can create a situation in which heat illnesses are possible. The advisory took effect at noon and lasts until 8 p.m.

Cooling centers will be open at five Community Action Partnership Center locations and at six senior centers from 9 a.m. to 7 p.m., offering cold water and air-conditioned space for residents without access to cool air in their homes.

All centers are accessible, air-conditioned and have water and restroom facilities. Medical care is not available and anyone experiencing or observing a medical emergency should call 911. Pets are not allowed in any cooling centers.

All Harford County Public Libraries will serve as “Cooling Centers” for the public’s use during normal business hours Monday and Tuesday. On Mondays, all branches are open 10 a.m. to 8 p.m. except for Darlington, which opens 3 to 8 p.m. On Tuesdays, the Bel Air Library opens 11 a.m. to 8 p.m.; the Darlington Library is open 3 to 8 p.m. and all other locations are open 1 to 8 p.m.

Mary Hansley had the right idea, hitting up a city cooling center on York Road.

"It's so hot, you could pass out from the heat, so I'm grateful they have this place available for people to stop in and get some water and get some air," Hansley said.

The heat can be especially hard on children. Down at the Inner Harbor, while kids were enjoying themselves in a fountain, Kristen Orem felt it might be best to take her daughter, Addie, to the Maryland Science Center to cool off.

"We try to go to the pool, but even on days like this, going to the pool, it's still just too hot. It's just dangerous having the little ones out here for too long," Orem said.

Health officials have a long list of reminders when it gets this hot, including drinking plenty of water, avoiding alcohol and caffeine, wiping your skin with cool water as needed, reducing outside activities and wearing lightweight, light-colored clothing.